{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4024-2TB05","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4024-2TB05","canonicalUrl":"https://aoctrl.com/siemens/3RW4024-2TB05","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4024-2TB05","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS soft starter, 3RW4024-2TB05, size S0, 12.5 A rated operational current at 40 °C, 24 V AC/DC control supply, integrated bypass, spring-loaded terminals.","salesMarkdown":"The Siemens 3RW4024-2TB05 is a SIRIUS soft starter in frame size S0, rated for 12.5 A at 40 °C, 11 A at 50 °C, and 10 A at 60 °C — the derating curve matters if your panel runs warm. Control supply is 24 V AC/DC at both 50 and 60 Hz, so one part covers both line frequencies without a jumper change. The 12.5 A rating at 40 °C is the headline number, but the 10 A at 60 °C is the one that governs if your enclosure runs hot — derating starts above 40 °C. The integrated bypass contactor means this soft starter switches to line power after start, so the thyristors only handle the ramp-up thermal load; no external bypass contactor needed. Spring-loaded terminals on both the main current circuit and the auxiliary/control circuit accept 2x (0.25... 2.5 mm²) solid or stranded — no ring lugs required, which speeds panel wiring. The front clamping point accepts 1x 8 mm² or 2x (16... 10) AWG for the main conductors. Motor overload protection is built in, with adjustable current limitation and intrinsic device protection. The minimum load is 20 % of the rated current, so it won't regulate properly on a grossly oversized motor — size the soft starter to the motor FLA, not the other way. Pollution degree 3 per IEC 60947-4-2. Insulation voltage is 600 V. Height is 150 mm, depth 155 mm. Clearance: 60 mm upwards, 40 mm downwards, 15 mm at the sides. Mounting position with an additional fan allows vertical surface mounting with +/-90° rotation and +/-22.5° tilt front/back; without a fan, only +/-10° rotation and +/-10° tilt. Maximum motor cable length is 300 m — fine for most motor centres; beyond that, check for voltage drop and reflected wave effects on the thyristors. The external reset input allows remote fault reset from a PLC or pushbutton.","metaTitle":"Siemens 3RW4024-2TB05 SIRIUS Soft Starter, 12.5 A, Size S0","metaDescription":"Siemens 3RW4024-2TB05 SIRIUS soft starter, 12.5 A at 40 °C, size S0, 24 V AC/DC control, integrated bypass.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"Depth":"155mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45mm","Height":"150mm","Upwards":"60mm","Downwards":"40mm","Thyristors":"Yes","At The Side":"15mm","During Storage":"-40 ... +80°C","External Reset":"Yes","lifecycle_stage":"current","During Operation":"-25 ... +60°C","Fastening Method":"screw and snap-on mounting","Minimum Load [%]":"20%","For Main Contacts":"16 ... 10, 1x 8","Mounting Position":"With additional fan: With vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back Without additional fan: With vertical mounting surface +/-10° rotatable, with vertical mounting surface +/- 10° t","Product Brand Name":"SIRIUS","Degree Of Pollution":"3, acc. to IEC 60947-4-2","Product Designation":"Soft starter","Wire Length Maximum":"300m","Derating Temperature":"40°C","Inside-Delta Circuit":"No","at 50 Hz rated value":"24V","at 60 Hz rated value":"24V","at 40 °C rated value":"12.5A","at 50 °C rated value":"11A","at 60 °C rated value":"10A","For Auxiliary Contacts":"2x (24 ... 14)","For Main Current Circuit":"spring-loaded terminals","Motor Overload Protection":"Yes","Intrinsic Device Protection":"Yes","Adjustable Current Limitation":"Yes","Size Of Engine Control Device":"S0","Insulation Voltage Rated Value":"600V","Using The Front Clamping Point":"1x 8, 2x (16 ... 10)","Operating Frequency Rated Value":"50 ... 60Hz","Display Version For Fault Signal":"red","Integrated Bypass Contact System":"Yes","For Auxiliary And Control Circuit":"spring-loaded terminals","Product Component Motor Brake Output":"No","during storage according to IEC 60721":"1K6 (only occasional condensation), 1C2 (no salt mist), 1S2 (sand must not get inside the devices), 1M4","reference code according to EN 61346-2":"Q","during operation according to IEC 60721":"3K6 (no formation of ice, no condensation), 3C3 (no salt mist), 3S2 (sand must not get into the devices), 3M6","during transport according to IEC 60721":"2K2, 2C1, 2S1, 2M2 (max. fall height 0.3 m)","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Evaluation Of Thermistor Motor Protection":"Yes","at standard circuit at 40 °C rated value":"7.5kW","at standard circuit at 50 °C rated value":"10hp","control supply voltage 1 at DC rated value":"24V","number of CO contacts for auxiliary contacts":"1","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"2","Type Of Voltage Of The Control Supply Voltage":"AC/DC","Control Supply Voltage Frequency 1 Rated Value":"50Hz","Control Supply Voltage Frequency 2 Rated Value":"60Hz","Installation Altitude At Height Above Sea Level":"5 000m","continuous operating current [% of Ie] at 40 °C":"115%","Operating Voltage At Standard Circuit Rated Value":"400 ... 600V","contact rating of auxiliary contacts according to UL":"B300 / R300","Relative Negative Tolerance Of The Operating Frequency":"-10%","Relative Positive Tolerance Of The Operating Frequency":"10%","relative negative tolerance of the control supply voltage at DC":"-20%","relative positive tolerance of the control supply voltage at DC":"20%","Relative Negative Tolerance Of The Control Supply Voltage Frequency":"-10%","Relative Positive Tolerance Of The Control Supply Voltage Frequency":"10%","Relative Negative Tolerance Of The Operating Voltage At Standard Circuit":"-15%","Relative Positive Tolerance Of The Operating Voltage At Standard Circuit":"10%","power loss [W] at operational current at 40 °C during operation typical":"2W","relative negative tolerance of the control supply voltage at AC at 50 Hz":"-15%","relative negative tolerance of the control supply voltage at AC at 60 Hz":"-15%","relative positive tolerance of the control supply voltage at AC at 50 Hz":"10%","relative positive tolerance of the control supply voltage at AC at 60 Hz":"10%","Adjustable Motor Current For Motor Overload Protection Minimum Rated Value":"5A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$350.52","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=178128&mlfb=3RW4024-2TB05","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RW4024-2TB05/alternatives.json"},"ai":{"faq":[{"question":"Does the 3RW4024-2TB05 require an external bypass contactor?","answer":"No — the integrated bypass contactor switches the motor to line power after the ramp, so no external bypass is needed."},{"question":"Where can I buy the Siemens 3RW4024-2TB05 soft starter?","answer":"This part is sourced to order; availability and pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4024-2TB05","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RW4024-2TB05 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}